Device for removing bark from logs



g- 23, 1932' J. M. COUNCIL 1,873,697

DEVICE FOR REMOVING BARK FROM LOGS .Filed April 3, 1951 3 Sheets-Sheet 1 GI Cl D u -cl 0 h w l N W s i I i W I i i 1'. 1 :11: iii ll: I 1:11:11: l

I W FE m %-%-A Aug. 23, 1932.

J. M. COUNCIL DEVICE FOR REMOVING BARK FROM LOGS Filed April 3, 1931 3 Sheets-Sheet 2 INVENTOR v vgiTM'oun 9251,

ATTORNEY J. M. COUNCIL DEVICE FOR REMOVING BARK FROM LOGS Aug. 23, 1932.

Filed April 5, 1951 aslieetg-sheet 3 INVENTOR Mbuml By.

' ATTORNEY Patented Aug. 23, 1932 A I UNITED STATES PATEN'lZ OFFICE JOHN H. COUNCIL, NORTH CAROLINA 4 nmcn iron arm ems BARK raom LOG-8 Application filed April 8, 1981. Serial No. 527,513.

This invention relates to a device for reing device constructed in accordance with moving bark from lo s. the principles of my invention,

It has been foun that bark is difficult Figure 2 is a transverse vertical section to remove from the log wood used in pulp taken along the line 22 of Figure 1,

6 mills, veneer mills, crate and box factories Figure=3 is a fragmentary horizontal secv55 during certain periods of the year so that tion taken along the line 33 of Figure 2, during the other periods it is necessary to re- Figure 4 is a side view in elevation of the move the bark from the logs and store the adjustable means for supporting logs of varilogs for those eriods when it has been found ous diameters. o

10 almost impossi le to remove the bark. Referring more particularly to the draw- It is an object of the present invention to ings, 10 designates a shaft which is su portprovide a device which will remove bark ed in bearings 11 carried by horizonta y disrom the logs in such an efiicient manner that posed beams 12 forming a part of the supthe bark may be removed throughout the porting structure for the device. This shaft 1 various seasons of the year. is driven by a pulley 13 and a belt 14 and 55 A further object of the invention is the the belt in turn is driven by any suitable revision of a device for removing bark source of power. rom logs in which a plurality of hammers Secured to the shaft is a pair of spaced are adapted to give progressive blows to the collars 15 and between these collars are 10- a .0 bark as the log is being revolved and substancated a plurality of discs 16 spaced from each tially in a spiral manner so that all parts of other by a plurality of alternately disposed the bark on the log are sub'ected to continudiscs 17 of lesser diameter than the discs 16. ous blows whereby the bar will, be readily The discs 16 and 17 are secured together by peeled or removed from the logs. means of rods 18, 19 and 20. The ends of 2 A further object of the invention is the these rods project outwardly beyond the provision of a device for supporting and reoutermost discs 16 and nuts are threaded on volving the 10 during the bark removing the end for clamping the discs together to rocess in whic an arm is provided and ad-- form a unitary structure. 1ustable towards or away from the hammers It will be noted from the various figures to compensate for various diameters of the that there are-a plurality of series of hamlogs, the arm being rovided at its inner and mers pivotally supported on the rods 20 besupporting end wit spaced rollers carried tween the various spaced discs 16. The by links or brackets pivoted intermediate hammers 21 are spaced 90 apart between their ends on the arm so that when the logs a pair of thee-discs 16 while four hammers 22 are dropped in place the rollers will auto are located between the next pair of spaced matically fall into supporting position for discs and are advanced at an angle of 30 the logs. from the hammers 21. A third series of This invention will be best understood hammers 23 are arranged between the next from a consideration of the following depair of spaced discs 16 and are placed at an 49 tailed description, in view of the accomangle of 30 in advance of the hammers 22 pianying drawings forming a part of the or in advance of the hammers 21. It will 7 specification; nevertheless it is to be underthus be noted that in all of the various series stood that the invention is not confined to the of hammers which are arranged successively disclosure, being susceptible of such changes between the pairs of discs 16 that they are 45 and modifications which shall define no maall advanced in the next succeeding series terial departure from the salient features of 30 from the preceding series. the invention as expressed in the appended The discs 16 are rotated in a direction inclaims. dicated by the arrow in Fig; 2 and it will be In the drawings: ndted that the outer free ends of the hammo 50 Figure 1 is a plan view of a bark removmers which project beyond the peripheries 2 move the same from'the logs. The rods 19 of the discs 16 are curvedrearwardly from the direction of rotation of said discs. The inner free or shorter ends of thehammers are located between the discs 16 and are adapted to normally en age the rods 19. The inner free ends of t e hammers, however, are sheared off along the arc of a circle so that when the hammers strike the log the free ends of the hammers will be moved backwardly and the -shorter ends 26 of said hammers will be able to pass the rods 19 which are in advance of the inner free ends of the hammers. I

During rotation of the disc and the hammers, the hammers cannot move forwardly towards the direction of rotation of the disc 16, but the rods 19 maintain the hammers in roper position so that they will strike the bark with suflicient vforce in order to renot only aid in securing the discs'together, but operate to prevent a hammer from swinging ahead of a predetermined point so that it will be in proper operative position when coming in contact with the bark on the log.

The logs are revolved by means of s aoed discs 30 which are revolved indepen ently of the discs 16 and the hammers. The diameters of the discs 30 are such that the peripheries of said discs extend beyond thev disc 16 in order that they will roperly engage the log 25 and cause the 0g to be revolved. The discs 30 are driven by means of friction discs 31 rigid on a shaft 32. It will.

be appreciated, however, that instead of the friction discs 31 that gears or any suitable well known mechanism may be employed for the purpose. In this event the teeth will be applied to the periphery of the disc 30 and these teeth will engage the bark of the log 25 and give a more positive rotation of the log.

Each of the discs 30 isprovided with a large. circular assage and the portion of the disc adjacent t e central passage is rovided with a reduced portion 33 adapted tobe seated between a pair of peripheral flanges 34 of discs 35. The discs 35 are loose upon the shaft 10 and are connected together by means of bolts'36. Since the rods 19 and 20 pass through the discs 35 said discs will be revolved simultaneously with the discs 16 and 17. Adjacent the periphery of the discs 35 are provided shoulders 37 upon which the periphery of the reduced portion 33 rests. Shoulders 38 are also provided adjacent the inner periphery of the discs 30 which are engagedby the free peripheral edges of the flanges 34:. t

The friction disc or gears 31 are driven by the shaft 32 which extends in parallel relation with the shaft 10 and this shaft is driven by means of a pulley 41 fixed to the shaft 40, a pulley 42 fixed to the shaft 10 and a belt 43 trained on the pulleys 41 and 42. The

shaft 40 is supported in bearings 44 carried by the beam 12.

I A rod or arm 50 is inclined at an an Is to the horizontal and is slidably mounte in a bearing 51 formed in a standard 52 of a framework 53. The outer free end of the arm 50 is provided with a in 54 received within an elongated slot 55 ormed in the bottom of a lever 56 pivotally mounted at 57 on the framework 53. This lever carries a pawl 58 adapted to engage the teeth of a rack 59 supported u on the top of the framework 53 so that w en the lever is placed in a predetermined position the pawl and the teeth will retain the lever against movement.

A pair of links 60 are pivotally mounted at 61 u on the outer free end of the arm 50 and rollbrs 61 and 62 are carried at the extreme end of said links and these roliers are.

adapted to engage the log for supporting the log and permit rotation thereof when the bark is being removed. It will be noted that the pivots of the links 60 are adjacent the rollers 62 so that when the log is dropped in posi-.

provides a protective covering over the re volving hammers 21 to 23, inclusive, in order to reven't injury to the workmen.

n the operation of the device the logs are lplaced upon the horizontal portion of the ood 66 and moved alon the curved portion 65 and dropped in place betwen the rollers 61 and 62 and the spaced master discs 30.

When the shaft 10 is driven the hammers will move progressively forward and give successive blows in a spiral manner to the bark on the log 25. The revolving master discs. 30 being in engagement with the 10 25 will cause rotation of the log at a s eed w ich will be controlled by the motor w ich drives the device and also the diameters of the drums 41 and 42 but the speed of the master discs is independent of the speed of the hammers. A series of hammers may not be confined to the arrangement described, but may consist of two hammers 180 apart; three hammers 120 apart; or six hammers 60 apart. The adjacent series may be in line or may be advanced more than 30, if desired. In other words, the hammers may be suitably arranged for different woods, or for seasonal changes in the physical condition of the different woods.

I claim:

1. A device for peeling 'bark from logs comprising a driven shaft, a plurality of discs secured to the shaft, each alternate disc being of greater diameter than the intermediatel disposed discs, all of the discs having 5 aline passages, bolts inserted through the passages for securing the discstogether, hammers'pivotally mounted intermediate the ends thereof between pairs of the alternate discs, means engaging the inner free ends of the hammers for limiting the movement of the outer free ends of the hammers towards the direction of travel of the discs, spaced discs mounted for rotation on the shaft independently of the shaft, means for causin rotation of the discs, the last-mentione discs adapted to engage a log acted on by the hammers for causing rotation of said 10 2. In a device for peelin bark roin logs, a plurality of hammers ior progressively beating the bark on a log, means for supporting the log in operative relation with the heaters and comprising arms, links pivotally mounted on the free ends of the arms, rollers mounted at the opposite ends of the links, thelinks being pivotally mounted adjacent the lowermost roller, said roller being ositioned in the ath of the incoming log and when engaged y the log causin oscillation of the links and movin the ct er roller into en- I so gagement with t e log, the spaced rollers forming a seat for aiding in supporting the log.

JOHN M. COUNCIL. 

